Thread: COSCAST MOTOR?

Re engine problems, read this thread. RangeRovers.net • View topic - Liner failures in Land Rover V8 engines - what's happening?

Regarding the discussion of oil in the head bolt holes and thermal expansion, I've seen this before at my work on an apron feeder (feeds rock onto a conveyor belt prior to milling). The practice was to lubricate the bolts then put them in and torque them up. We were continuously running into issues with this over a long period of time whereby the pressure of the oil in the thread hole has heated up with movement and cracked a solid steel mounting. I'd almost put money on it, to say that is the reason the crack appeared in that particular block! But to cause the crack it would need to have overheated in a big way.

If my heads ever get removed i'll be getting slightly shorter bolts for mine.

And if it ever needs a rebuild i'll be getting an LS3 or 6.5 Chev V8 diesel!

Cheers
Keithy

There are reports of cracked Coscasts starting to come through. V8 Developments refuse to warranty these now for this reason. Although the new castings are superior to the old LR ones, the crucial liner problem was not really addressed - they should have been produced with flanged (top hat) liners installed.

You'd be wiser spending money on a seasoned top hatted block than risking failure with a new one, that fixes the problem permanently.

This link was posted in the Good Oil Section. A great read to understand the problem and cure


JE Robison Service — the blog: The last word on Land Rover liner failures - I hope!

Referred to in my link above (a thread by John Robison).

THANKS guys i think youv confirmed it for me now, im looking at the turner engineering seasoned block with duktyle liners fitted already, they send worldwide n all... do does anyone know anything bout em???

They're about the best you can get. Family business with a good solid reputation. They can ship with DHL for about UKP500 for a fully assembled long motor, maybe cheaper for a short. Takes around 2 weeks, then you have to pay customs duties (roughly 15% of the value I think).

Originally Posted by DANMAL

THANKS guys i think youv confirmed it for me now, im looking at the turner engineering seasoned block with duktyle liners fitted already, they send worldwide n all... do does anyone know anything bout em???

I assume that's "ductile" and not a brand name. Are they top hat liners?